Rock Identifier

Category

Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate)

Browse sedimentary rock (technically a microcrystalline quartz mineral aggregate) specimens identified by the Rock Identifier community.

Learn about Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate) in the encyclopedia

Chert

Kiwi Jasper

Coal

Flower Jasper

Feather Jasper

Claystone

Shale

Dendritic Jasper

Sandstone

Zebra Jasper

Siltstone

Bumblebee Jasper

Bumblebee Jasper

Chert (Field Stone/Pebble) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Field Stone/Pebble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Quartz (Chert / Agate / Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert / Agate / Chalcedony)

Silicon Dioxide (SiO2)

Shale (or Mudstone) (Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock) — sedimentary

Shale (or Mudstone)

Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock

Chert / River Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / River Pebble

Microcrystalline Quartz (SiO2)

Chert / Jasper / Agate (Chalcedony Group) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Jasper / Agate (Chalcedony Group)

Microcrystalline Quartz (SiO2)

Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Rounded river pebble, likely basalt or fine-grained volcanic rock (Probable basalt (plagioclase–pyroxene ± olivine), though exact identification requires testing) — igneous

Rounded river pebble, likely basalt or fine-grained volcanic rock

Probable basalt (plagioclase–pyroxene ± olivine), though exact identification requires testing

Yellow jasper or iron-stained chert (Microcrystalline quartz (SiO₂), commonly colored by iron oxides) — sedimentary

Yellow jasper or iron-stained chert

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Ocean Jasper (Orbicular Jasper (Silicon Dioxide, SiO2)) — mineral

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Quartz (likely Milky Quartz) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Leopard jasper (orbicular jasper) (Silicified volcanic tuff/chert; predominantly microcrystalline quartz (SiO₂) with iron oxides and volcanic minerals) — sedimentary

Leopard jasper (orbicular jasper)

Silicified volcanic tuff/chert; predominantly microcrystalline quartz (SiO₂) with iron oxides and volcanic minerals

Grey River Pebble (Greywacke / Basalt) (Stream-rounded silicate rock pebble) — sedimentary

Grey River Pebble (Greywacke / Basalt)

Stream-rounded silicate rock pebble

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Yellow Quartzite (River Pebble) (Metamorphic Quartzite (primarily SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Metamorphic Quartzite (primarily SiO2)

Quartz geode or quartz-bearing rock (Quartz (SiO₂), likely in a chalcedony- or basalt-hosted cavity) — mineral

Quartz geode or quartz-bearing rock

Quartz (SiO₂), likely in a chalcedony- or basalt-hosted cavity

Quartzite with Mica Matrix (Metamorphic Quartz-Mica Schist/Quartzite) — metamorphic

Quartzite with Mica Matrix

Metamorphic Quartz-Mica Schist/Quartzite

Chert (Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Quartz / Common Opal Transition (Silicon Dioxide (SiO2)) — mineral

Quartz / Common Opal Transition

Silicon Dioxide (SiO2)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

Chert Pebble (River Siltstone / Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble (River Siltstone / Jasper)

Microcrystalline Quartz (SiO2)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Weathered quartz-rich pebble (Quartzite or silicified sandstone; predominantly microcrystalline quartz (SiO₂)) — metamorphic

Weathered quartz-rich pebble

Quartzite or silicified sandstone; predominantly microcrystalline quartz (SiO₂)

Chert (Yellow Jasper / Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper / Flint)

Microcrystalline Quartz (SiO2)

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

Picture Jasper (SiO2, Microcrystalline Quartz) — mineral

Picture Jasper

SiO2, Microcrystalline Quartz

Chert (Chert / Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chert / Flint)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Quartz fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Quartz fragment

Quartz (silicon dioxide, SiO₂)

Asphalt aggregate (Human-made bituminous asphalt containing crushed silicate rock aggregate) — sedimentary

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Chert (Commonly known as Jasper or Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Commonly known as Jasper or Flint)

Microcrystalline Quartz (SiO2)

Geode (Quartz / Chalcedony nodule) — sedimentary

Geode

Quartz / Chalcedony nodule

Chert (Yellow/Tan Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow/Tan Jasper)

Microcrystalline Quartz (SiO2)

Chert (Flint) / Silicified Limestone (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint) / Silicified Limestone

Microcrystalline Quartz (SiO2)

Chert / Flint (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert / Flint

Chert (Microcrystalline Quartz, SiO2)

Basalt with Vesicles (Vesicular Basalt (Mafic Extrusive)) — igneous

Basalt with Vesicles

Vesicular Basalt (Mafic Extrusive)

Mixed rough mineral specimens, likely quartz-bearing rocks (Probable quartz (SiO₂), with possible feldspar, iron oxides, and altered host rock) — mineral

Mixed rough mineral specimens, likely quartz-bearing rocks

Probable quartz (SiO₂), with possible feldspar, iron oxides, and altered host rock